3.000mm Aluminum Sheets | McMaster-Carr

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Fabrication Fabrication

Cold Worked

Extruded

Hot Rolled

	Heat Treatable Heat Treatable

Yes

	Color Color

	Amber		Black
	Gray		Red
	White

	Yield Strength Yield Strength

20,000 to 99,999 psi

	Elongation Elongation

48 Products

Multipurpose 6061 Aluminum Sheets and Bars

The most widely used aluminum, 6061 is fabricated into everything from pipe fittings and containers to automotive and aerospace parts. It is strong and corrosion resistant, plus it's easy to machine and weld.

Extruded sheets and bars are formed by a die for close-tolerance widths, then cut to the lengths listed.

Aluminum that meets ASTM B209 or ASTM B221 complies with standards for materials.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Metric Bars

Yield Strength: 35,000 psi
Hardness: Brinell 95 (Soft)
Temper: T6
Fabrication: See table
Specifications Met: ASTM B221

3 mm Thick. (-0.152 to 0.152 mm Tolerance)
Wd., mm	Fabrication	Heat Treatment	Temperature Range, °F	Flatness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
5	Extruded	Hardened	-320° to 300°	0.006" per in.	0000000	00	00000	00000
10	Extruded	Hardened	-320° to 300°	0.006" per in.	0000000	00	0000	0000
15	Extruded	Hardened	-320° to 300°	0.006" per in.	0000000	00000	0000	0000
20	Extruded	Hardened	-320° to 300°	0.006" per in.	0000000	0000	0000	00000
25	Extruded	Hardened	-320° to 300°	0.006" per in.	0000000	0000	0000	00000
30	Extruded	Hardened	-320° to 300°	0.006" per in.	0000000	0000	0000	00000
40	Extruded	Hardened	-320° to 300°	0.006" per in.	0000000	0000	00000	00000

Multipurpose 304 Stainless Steel

From cookware to chemical-processing equipment, 304 stainless steel is a good all-around choice for a wide range of applications. It maintains its corrosion resistance in temperatures up to 1500° F.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

304 Stainless Steel Bars

Yield Strength: 30,000 psi
Hardness: See Table
Heat Treatment: Annealed (Softened)
Heat Treatable: No
Specifications Met: See Table

3 mm Thick. (-0.06 mm to 0 mm Tolerance)
Wd.	Wd. Tolerance	Fabrication	Hardness	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
12mm	-0.11mm to 0mm	Cold Worked	Rockwell B80 (Medium)	Not Rated	0000000	000000	000000	000000
20mm	-0.13mm to 0mm	Cold Worked	Rockwell B80 (Medium)	Not Rated	0000000	00000	00000	000000
25mm	-0.13mm to 0mm	Cold Worked	Rockwell B80 (Medium)	Not Rated	0000000	00000	00000	000000

Low-Carbon Steel Sheets and Bars

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as fixture clamps, mounting plates, and spacers. Some of this material can be surface hardened with heat treating.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Metric Bars

Yield Strength: 34,000 psi
Hardness: Rockwell B90 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Not Rated

3 mm Thickness (-0.06 to 0 mm Tolerance)
Wd., mm		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
6	0000000	00000	00000	000000
12	0000000	0000	0000	00000
20	0000000	0000	00000	00000
25	0000000	0000	00000	00000

Tight-Tolerance Low-Carbon Steel Bars

With a thickness that's precision ground to a tight tolerance, these bars are sometimes called flat stock. Low-carbon steel, also known as mild steel, is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as fixture clamps, mounting plates, and spacers. This material can be surface hardened with heat treating. All steel meets ASTM A36 standards for materials.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Metric Bars

Yield Strength: 36,000 psi
Hardness: Not Rated
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C65

3 mm Thick. (-0.025 to 0.025 mm Tolerance)
Wd., mm	Mechanical Finish	Specifications Met		1 ft. Lg.	2 ft. Lg.
10	Precision Ground	ASTM A36	00000000	000000	000000
15	Precision Ground	ASTM A36	00000000	00000	00000
20	Precision Ground	ASTM A36	00000000	00000	00000
25	Precision Ground	ASTM A36	00000000	00000	00000

Low-Carbon Steel Bars with Rounded Edges

Yield Strength: 35,000 psi
Hardness: Rockwell B65 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C60

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as fixture clamps, mounting plates, and spacers. This material can be surface hardened with heat treating.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Metric Bars

3mm Thick. (-0.09mm to 0.09mm Tolerance)
Wd., mm		1 5/8 ft. Lg.	3 1/4 ft. Lg.	6 1/2 ft. Lg.
25	0000000	000000	000000	000000
50	0000000	00000	00000	00000

Tight-Tolerance Multipurpose Oil-Hardening O1 Tool Steel Sheets and Bars

Also known as flat stock, these precision-ground sheets and bars are held to a tight thickness tolerance. Often used for dies, punches, and gauges, O1 tool steel is an oil-hardening material that resists wear and abrasion.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Metric Bars

Yield Strength: 80,000 psi
Hardness: Rockwell B90 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C65
Specifications Met: ASTM A681

				3 ft. Lg.
Wd., mm	Heat Treatment	Mechanical Finish	Flatness Tolerance		Each
3 mm Thick. (0 mm to 0.05 mm Tolerance)
15	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	000000
25	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	00000
100	Annealed (Softened)	Precision Ground	0.005" per ft.	0000000	000000

Metric Electrical-Insulating Plastic Washers

These washers are excellent electrical insulators.

Glass-filled nylon washers are reinforced with glass for increased strength. Exposure to moisture may cause them to expand.

For technical drawings and 3-D models, click on a part number.

Glass-Filled Nylon Plastic
For Screw Size	ID, mm	OD, mm	Max. Temperature, °F	Hardness	Specifications Met	Pkg. Qty.		Pkg.
White
M16	17	30.0	220°	Rockwell M111	UL 94 HB	1	000000000	00000

Metric Split Lock Washers

Curved Stainless Steel

Curved Zinc-Plated Steel

Wave Zinc-Plated Steel

Curved Yellow Zinc-Plated Steel

Curved Black-Oxide Steel

Curved

Wave

As you tighten a bolt, these metric washers flatten to add tension to the threaded joint and prevent loosening from small amounts of vibration. They meet a DIN or ASME standard for split lock washer dimensions.

Curved and wave split lock washers can be used with fasteners that have right- or left-hand threads to prevent clockwise and counterclockwise rotation. These washers are reusable—they retain their shape when untightened and will not damage fasteners. Wave washers touch fasteners at more points, so they grip tighter than curved washers. Their shape also compensates for uneven surfaces and tolerance variations.

Stainless steel washers resist corrosion better than steel and are nearly as strong. 18-8 stainless steel washers withstand humid, damp, and washdown environments but will corrode when exposed to salt water and other chlorine solutions. Stronger and more durable than stainless steel, zinc-plated and yellow zinc-plated steel washers withstand wet environments. However, they will corrode in salt water and chlorine solutions. The zinc plating temporarily protects against rust, but once it wears off, the steel will rust.

Steel washers are stronger and resist wear better than zinc-plated steel and stainless steel washers. Use them in dry environments. Black-oxide steel washers have a black residue that forms from being heat treated; the color will wear away over time.

For technical drawings and 3-D models, click on a part number.

18-8 Stainless Steel
For Screw Size	ID, mm	OD, mm	Thick., mm	Overall Ht., mm	Hardness	Specifications Met	Pkg. Qty.		Pkg.
Curved
M20	20.2	33.6	3.0	5.1	Not Rated	DIN 128A	10	000000000	000000
M22	22.5	35.9	3.0	5.1	Not Rated	DIN 128A	5	000000000	0000
Zinc-Plated Steel
Curved
M20	20.2	33.6	3.0	5.1	Rockwell C44	DIN 128A	10	000000000	0000
M22	22.5	35.9	3.0	5.1	Rockwell C44	DIN 128A	10	000000000	00000
Wave
M22	22.5	35.9	3.0	5.1	Rockwell C44	DIN 128B	5	000000000	0000
Yellow Zinc-Plated Steel
Curved
M20	20.2	33.6	3.0	5.1	Rockwell C44	DIN 128A	10	000000000	00000
Black-Oxide Steel
Curved
M20	20.2	33.6	3.0	5.1	Rockwell C44	DIN 128A	5	000000000	0000

Spring Lock Washers for Slotted Bearing Nuts

For Chamfered Nuts

Designed for use with bearing nuts, these lock washers have a conical shape that presses like a spring against bearings, bushings, gears, and pulleys to hold them in place on your threaded shaft or spindle. They also have an inner tab that sits in the shaft or spindle’s keyway to prevent the nut from loosening. Made of steel, they’re strong and flexible.

Spring lock washers with external teeth grip components using their teeth, in addition to spring tension.

DIN 462 and DIN 5406 washers meet international standards for lock washer dimensions. Pair DIN 462 washers with DIN 1804 bearing nuts, and DIN 5406 washers with DIN 981 bearing nuts.

For technical drawings and 3-D models, click on a part number.

				Tab
For Screw Size	ID, mm	OD, mm	Thick., mm	Wd., mm	Dp., mm	Overall Ht., mm	Hardness	Specifications Met	For Bearing Nut Specifications Met		Each
Steel
For Chamfered Nuts—with External Teeth
M220	220.0	292.0	3.00	24.0	7.0	13.0	Not Rated	DIN 5406	DIN 981	000000000	0000000

Metric Spring Lock Washers

Conical

The arched shape of these washers presses up against a bolt and down against a nut to prevent loosening from wear, vibration, or temperature changes. Similar to a spring, they flatten out as pressure is applied, helping to absorb shocks. They grip bolts more tightly than split and tooth lock washers. Unlike split lock washers, which can only be tightened in one direction, these washers have a continuous body that can rotate in either direction.

Conical and curved washers are functionally the same, and are often referenced using their DIN specifications. These DIN specifications refer to slight differences in OD and thickness. DIN 6796 is the standard for conical spring lock washers, which are also known as Belleville washers.

Steel washers are stronger and more wear resistant than zinc-plated steel and stainless steel. They are best for dry environments, since moisture will cause them to rust. Zinc-plated washers have an outer layer of zinc that protects the inner steel from rust and extends the life of the washer. Similar to zinc plating, washers with a black phosphate coating are protected from rust in wet environments. They have a black finish that blends in with dark surfaces.

Stainless steel washers are more corrosion resistant than steel, and almost as strong. 18-8 stainless steel washers will hold up in wet and humid environments, but will corrode if exposed to salt water or chemicals. 316 stainless steel washers are the most corrosion resistant, and will not corrode from water, salt, or chemicals.

For technical drawings and 3-D models, click on a part number.

Conical—DIN 6796
For Screw Size	ID, mm	OD, mm	Thick., mm	Overall Ht., mm	Hardness	Pkg. Qty.		Pkg.
Steel
M12	13.0	29.0	3.0	4.00	Rockwell C42	10	000000000	000000
Zinc-Plated Steel
M12	13.0	29.0	3.0	4.00	Rockwell C42	5	000000000	00000
Black-Phosphate Steel
M12	13.0	29.0	3.0	3.95	Not Rated	10	000000000	00000
18-8 Stainless Steel
M12	13.0	29.0	3.0	4.00	Not Rated	10	000000000	0000
316 Stainless Steel
M12	13.0	29.0	3.0	4.00	Not Rated	1	000000000	0000

High-Temperature Silicone Rubber Sheets, Bars, and Strips

Also known as polysiloxane, this silicone rubber offers good resistance to ozone and salt water. Softer durometer rubber has better conformability; harder durometer rubber is more wear resistant.

For technical drawings and 3-D models, click on a part number.

Metric Sheets

Color: Red
Temperature Range: -100° to 500° F
Tensile Strength: 700 psi
For Use Outdoors: Yes
Specifications Met: ASTM D2000 GE, FDA Compliant 21 CFR 177.2600, Fed. Spec. ZZ-R-765, MIL-A-A-59588

			12" × 12"		24" × 24"		36" × 36"
Thick., mm	Thick. Tolerance, mm	Durometer		Each		Each		Each
3	-0.500 to +0.500	50A (Medium)	0000000	000000	0000000	0000000	0000000	0000000

High-Strength High-Temperature Silicone Rubber Sheets and Strips

Greater strength than standard High-Temperature Silicone translates into better shock-absorbing qualities and longer life. Silicone, commonly called polysiloxane, offers good resistance to ozone and salt water.

For technical drawings and 3-D models, click on a part number.

Metric Sheets

Color: Red or gray
Temperature Range: -80° to 425° F
Tensile Strength: 1,200 psi
For Use Outdoors: Yes

			Red		Gray
Thick., mm	Thick. Tolerance, mm	Durometer		Each		Each
12" × 12"
3	-0.400 to +0.400	50A (Medium)	0000000	000000	0000000	000000

Metric Adhesive-Back Sheets

Color: Red or gray
Temperature Range: -80° to 425° F
Tensile Strength: 1,200 psi
For Use Outdoors: Yes

		Adhesive				Red		Gray
Thick., mm	Thick. Tolerance, mm	Type	Temp. Min., °F	Temp. Max., °F	Durometer		Each		Each
12" × 12"
3	-0.400 to +0.400	Acrylic	Not Rated	200°	50A (Medium)	00000000	000000	00000000	000000

Abrasion-Resistant Polyurethane Rubber Sheets, Bars, and Strips

This polyurethane combines the shock absorbing qualities of rubber with the tear resistance of plastic. Use it for high-tension applications such as conveyor belts, as well as for high-wear applications such as cutting surfaces, bumpers, and liners.

For technical drawings and 3-D models, click on a part number.

Semi-Clear to Opaque Metric Sheets

Color: Amber (semi-clear to opaque)
Temperature Range: -10° to 200° F
Tensile Strength: 5,500 psi
For Use Outdoors: Yes

			12" × 12"
Thick., mm	Thick. Tolerance, mm	Durometer		Each
3	-0.4 to +0.4	80A (Hard)	0000000	000000

High-Strength Oil-Resistant Buna-N Rubber Sheets and Strips

These sheets and strips offer better shock-absorbing qualities and longer life than standard Oil-Resistant Buna-N. Buna-N is also known as nitrile, NBR, and acrylonitrile butadiene. It resists fuel oil, hydraulic oil, ethylene glycol, and grease.

For technical drawings and 3-D models, click on a part number.

Metric Sheets

Color: Black
Temperature Range: -40° to 212° F
Tensile Strength: 1,500 psi
For Use Outdoors: No

			12" × 24"
Thick., mm	Thick. Tolerance, mm	Choose a Durometer		Each
3	-0.400 to +0.400	50A (Medium), 60A (Medium Hard), 70A (Hard)	00000000	000000

Cut-to-Length Metric Sheets

Color: Black
Temperature Range: -40° to 212° F
Tensile Strength: 1,500 psi
For Use Outdoors: No

			36" Wd.
Thick., mm	Thick. Tolerance, mm	Choose a Durometer		Per Ft.
3	-0.400 to +0.400	50A (Medium), 60A (Medium Hard), 70A (Hard)	00000000	000000

Starrett Feeler Gauge Sets

Tool Steel

Check gaps, alignment, and narrow slots with these feeler gauge sets that include leaves in a variety of thicknesses riveted together in a fan design. Sets fold up for portability. Each leaf is marked with thickness. Leaf-securing locks hold individual gauge leaves in place.

Tool steel gauge sets are stronger, harder, and more wear resistant than stainless steel.

		Leaf		Closed
No. of Leaves	Thick.	Lg.	Wd.	Lg.	Wd.	Manufacturer Model No.		Each
Tool Steel
13	0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.10 mm, 0.15 mm, 0.20 mm, 0.30 mm, 1.0 mm, 2.0 mm, 3.0 mm, 5.0 mm	4 1/2"	1/2"	4 15/16"	1/2"	467M	0000000	0000000